tests/tcg/aarch64/pauth-1.c

   1 #include <assert.h>
   2 #include <sys/prctl.h>
   3 #include <stdio.h>
   4
   5 #ifndef PR_PAC_RESET_KEYS
   6 #define PR_PAC_RESET_KEYS  54
   7 #define PR_PAC_APDAKEY     (1 << 2)
   8 #endif
   9
  10 #define TESTS 1000
  11
  12 int main()
  13 {
  14     int x, i, count = 0;
  15     void *p0 = &x, *p1, *p2;
  16     float perc;
  17
  18     for (i = 0; i < TESTS; i++) {
  19         asm volatile("pacdza %0" : "=r"(p1) : "0"(p0));
  20         prctl(PR_PAC_RESET_KEYS, PR_PAC_APDAKEY, 0, 0, 0);
  21         asm volatile("pacdza %0" : "=r"(p2) : "0"(p0));
  22
  23         if (p1 != p0) {
  24             count++;
  25         }
  26         if (p1 != p2) {
  27             count++;
  28         }
  29     }
  30
  31     perc = (float) count / (float) (TESTS * 2);
  32     printf("Ptr Check: %0.2f%%\n", perc * 100.0);
  33     assert(perc > 0.95);
  34     return 0;
  35 }